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drm/i915/dp: Add debugfs entry to get the link retrain disabled state

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Add a connector debugfs entry showing if link retraining is disabled.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610164933.2947366-22-imre.deak@intel.com
This commit is contained in:
Imre Deak
2024-06-10 19:49:33 +03:00
parent 09f08c6ccc
commit d6bbb6e581
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/i915/display/intel_dp_link_training.c
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@@ -1898,6 +1898,25 @@ DEFINE_DEBUGFS_ATTRIBUTE(i915_dp_force_link_retrain_fops,
i915_dp_force_link_retrain_show,
i915_dp_force_link_retrain_write, "%llu\n");
static int i915_dp_link_retrain_disabled_show(struct seq_file *m, void *data)
{
struct intel_connector *connector = to_intel_connector(m->private);
struct drm_i915_private *i915 = to_i915(connector->base.dev);
struct intel_dp *intel_dp = intel_connector_to_intel_dp(connector);
int err;
err = drm_modeset_lock_single_interruptible(&i915->drm.mode_config.connection_mutex);
if (err)
return err;
seq_printf(m, "%s\n", str_yes_no(intel_dp->link.retrain_disabled));
drm_modeset_unlock(&i915->drm.mode_config.connection_mutex);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(i915_dp_link_retrain_disabled);
void intel_dp_link_training_debugfs_add(struct intel_connector *connector)
{
struct dentry *root = connector->base.debugfs_entry;
@@ -1923,4 +1942,7 @@ void intel_dp_link_training_debugfs_add(struct intel_connector *connector)
debugfs_create_file("i915_dp_force_link_retrain", 0644, root,
connector, &i915_dp_force_link_retrain_fops);
debugfs_create_file("i915_dp_link_retrain_disabled", 0444, root,
connector, &i915_dp_link_retrain_disabled_fops);
}